<app-footer #footer (outer)="run($event)"></app-footer>

<br>
<br>
<hr>
<div>这是一个新闻组件</div>

<button (click)="getChildMsg()">获取子组件的msg</button>

<br><br>
<button (click)="getChildRun()">执行子组件的run方法</button>
